hope I'm not bumping but the best thing to do id get a gunship, get it full of allies and head to the tecno union ships. Use all your missiles and let the AI manning the laser turrets destroy each ship. After each one you will have to head back to the cp at the end of the map to refill on rockets. Once the 3 ships are down, you and your passengers should move into the spire. Capture it. Then you and Mace Windu should be able to thin out the enemy.